Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d1ebfe49c451a08…

MALICIOUS

PDF

71.5 KB Created: 2021-10-03 15:22:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9678d865f752aa1eeb535e4b24ddd7fc SHA-1: 9b2bc1832d1760a31a7d0e7000c6af99e6ab7878 SHA-256: 9d1ebfe49c451a08a8db513e8ac367634f3cce54c9e8b861156adbb5556d4d9a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to various domains, many of which are hosted on compromised CMS upload storage or appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary goal appears to be directing users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://rioairporttransfer.com/ckfinder/userfiles/files/bikevuzewevifipi.pdf In PDF document text
    • http://gorod-r.com/userfiles/file/negewa.pdfIn PDF document text
    • http://haustechnik-hagenauer.at/zovuzikilujuv.pdfIn PDF document text
    • http://atomiccm.com/userfiles/files/jewevunawujotusu.pdfIn PDF document text
    • http://www.barbazan-debat.fr/ckfinder/userfiles/files/12259496690.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/161350b072a255---91565349213.pdfIn PDF document text
    • https://funcarele.com/ckfinder/userfiles/files/wekapevikakugeteva.pdfIn PDF document text
    • https://latework.cz/soubory/50848977843.pdfIn PDF document text
    • https://triptoboloyfoundation.org/editorsfiles/files/nuwelolilakexusefowolok.pdfIn PDF document text
    • http://restavratorstvo.com/ckfinder/userfiles/files/xodaranusasisiwasuwage.pdfIn PDF document text
    • http://zulassungsservice4you.de/bilder/file/wewikepod.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/161530efc580a9---83545758551.pdfIn PDF document text
    • https://atlaskvartir.ua/data/uploads/files/fafik.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/68320339457.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/16156b2589b9d9---67477035031.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/161346b9dd6145---17857862357.pdfIn PDF document text
    • http://pro-group.ru/userfiles/file/76648161108.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130d345a083d---zigomoba.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1614daf512ba7b---61956303786.pdfIn PDF document text
    • https://sistemagestiondpr.com/userfiles/file/29145314566.pdfIn PDF document text
    • http://xn--2e0b30g3uq7pay7m.com/upload/fckeditor/file/48208408874.pdfIn PDF document text
    • https://jahanchart.ir/data/files/file/80167614533.pdfIn PDF document text
    • http://jarauwerdaenzn.nl/userfiles/file/zutovupowumaxowifozasori.pdfIn PDF document text
    • http://thebankcardservices.com/uploads/files/rovupowugetus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=uceed+previous+year+question+papers+with+solutions+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b3e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3E2 11236 bytes
SHA-256: 25943f040567d8dde561f66436c73bbbdddef54acb7e9f35329b139d3460390b
font_01_sfnt_off0000ce01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE01 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE613 16152 bytes
SHA-256: bb49578d2cdf6a4d00fd4231d03bcab5e1ca378305d731f4142a82b095871026

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